The colloquium HIPPARCOS
Scientific Aspects of Input Catalogue Preparation, held in Sitges, Spain,
January 25 - 29, 1988, is described. Also described is a celebratory symposiun
on a Decade of UV Astronomy with the IUE Satellite, held April 12 - 15,k 1988
in Greenbelt, MD. Brief description of the European astrometric satellite
HIPPARCOS and the ultraviolet satellite Internation Ultraviolet Explorer (IUE)
are given. AAVSO participation in the scheduling of observations of large-amplitude
variable stars (Mira and semiregular) with HIPPARCOS is discussed.